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Callirhytis quercussuttoni
2222_3381 Photo added 2022-02-06

Callirhytis quercussuttoni (Hymenoptera: Cynipidae)
Knowland Park, Oakland, Alameda County, California
November 7, 2021

Root galls caused by gall wasps. Host is Quercus agrifolia (coast live oak). These galls were just below the duff along a horizontal root of a large tree.

all photos and text © Joyce Gross